Accident Description

Accident: Tesoro Martinez Sulfuric Acid Spill

Location: Location: Martinez, CA

Accident Occurred On: 02/12/2014 | Final Report Released On: 08/02/2016

Accident Type: Release

Investigation Status: The CSB's investigation was released at a news conference in Emeryville, CA, on 8.2.2016

A sulfuric acid spill on February 12, 2014, burned two workers in the refinery’s alkylation unit, who were transported to the nearest hospital burn unit by life flight. The incident occurred when the operators opened a block valve to return an acid sampling system back to service. Very shortly after this block valve had been fully opened, the tubing directly downstream of the valve came apart, spraying two operators with acid.